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torn fu b 1 : bunker Antena Coupler
Old 01-26-2014, 11:37 AM   #1
rv12p2000
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Default torn fu b 1 : bunker Antena Coupler

Hello

Find on the net at this url : http://le-pingouin-62.chez-alice.fr/r504.htm

see chapter radio : accessory antenna for use inside a bunker

an accesory for torr fu b1 : http://le-pingouin-62.chez-alice.fr/...anschlus-4.jpg

you have also other plug for antenna

regards Rv12p2000


Last edited by rv12p2000; 01-26-2014 at 11:40 AM. Reason: mistake
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Festungsantenne
Old 01-27-2014, 02:03 PM   #2
Funksammler
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Default Festungsantenne

The antenna tuner of the "Festungsantenne" was only used with shortwave radio's such as the Torn.fu.b1 and f. The tuner was plugged into the "Innenanschlussdose" which was connected with a coaxial cable to the "Aussenanschlussdose" near the antenna niche.

If VHF sets like the Torn.Fu.d2 were used, the antenna was directly connected into the "Innenanschlussdose" without the use of the tuner; because the coaxial cable acts like a transmission line for VHF, the coax cable had to be of specific lengths. That is why you often see the coax cable mounted in a zig-zag pattern on the wall to take up the excess length.

The antenna itself was plugged into the "Aussenanschlussdose", a special antenna top was pushed with two telephone "Baustangen" or "Drahtgabelstangen" up through the antenna shaft, as it emerged from the top of the shaft, three long rods automatically spread out to form the antenna. I guess the theory was that two of the rods could be shot off before the antenna stopped working...

The ground of the antenna was connected to the metal antenna shaft, which in turn was welded to the rebars of the concrete structure, so that the roof of the bunker formed a good ground plane for the antenna.

I am still looking for a "Innenanschlussdose" to complete my Festungsanntenne setup....

regards,

Funksammler
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Old 01-27-2014, 03:11 PM   #3
Val
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Quote:
Originally Posted by Funksammler View Post
of the "Festungsantenne"
How did the antenna itself look like? Any picture? Thanks!
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Old 01-27-2014, 03:43 PM   #4
Funksammler
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Here is the antenna top on the roller bracket (which runs on little wheels through the antenna tube):

 photo DSC03821_zps98de8f73.jpg

Here are the antenna rods, two lengths of antenna could be made:

 photo fat_4_zps288e4788.jpg

regards,

Funksammler
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Old 09-09-2017, 05:02 AM   #5
le flibustier
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part of my collection
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